THE BOTANICAL MAGAZINE. 



Vol. X, No. 118. 



PA RT II. 



On Laminaria of Japan, 



{Concluded). 



By 

 K. Okamura, MigaJeuhakushi. 



With PI. VII. 



Laminaria radicosa Kjellm. 



Nom. jap. Antohu-me. 



This plant has been described by Kjellman" from the materials 

 collected by him at Cape Nomo in the province of Hizen. I referred 

 this species to the genus Ecklonia 2) , on the ground that the lateral 

 lobes are arranged in a pinnate manner. Since then I have examined 

 many specimens collected in several localities and I have found that some 

 have more regularly arranged pinnate lobes, while others none. Some 

 assume a form not differing at all from that of other species of 

 Laminaria, the margin of lamina either being entirely destitute of lobes 

 or sparingly provided. From investigation of those materials I find that 

 I erroneously took the marginal lobes for pinnae and that in consequence 

 this species should be restored to the original genus Laminaria. 



In the course of my study I found a number of plants remarkable 

 for the entire absence of marginal lobes. For the specific determination 

 of those plants I entered into a careful study of the structure of parts 



DKjellnian et Petersen — Om Japans Laminariaceer p. 263, Tab. 10, Fig. 1. 



2) okamura — Ecklonia radicosa— Bot. Magaz. of Tokyo, Vol. VI., No. 59, p. 1-6, PL I. 



